Method of making combined sound and picture records



July 12, 1932,

' Filed Feb. 5, 1930 L. A. JONES METHOD OF muse COMBINED s'ounn AND PICTURE ancoans Lgyd A. Jones.

:Qs STT LOYD A. JONES, OF ROCHESTER, NEW YORK, ASSIGNOR T0 EASTMAN KQDAR COIQEAHY, 01?,BOCKESTER, NEW YORK, A CORPORATION OF NEW YQEE'.

METHOD OF MAKING (ZOMBINEDSQUND All PICTURE REGQRDS Application filedFebruary 5, 1936. Serial Hm 426,111.

are frequently made by reversal on the originally exposed film, this being common in amateur work. While it would be possible to make the sound record 01 the original film at the time of exposure this does not,'for various practical reasons. yield as good sound reproduction as when the sound is made on a separate film. If this record is then printed on the picture film and the sound and picture records developed and redeveloped together, the: sound record will be negative and the picture record positive. 1

I have invented a convenient method by which this may be avoided. I propose to make the original sound record, simultaneously with thepicture magnetically on a steel wire by the Poulsen method, this being an exceedingly simple process requiring only readily portable apparatus and this well adapted for armateur use.

The record is then transformed into a photographic record which is printed on the undeveloped sensitize filni carrying the latent picture record. The film is then submitted to a reversal process yielding positive picture I and sound records.

Reference will now be made to the accompanying drawing wherein the same reference characters "denote the same parts throughout and in which; v

Fig. 1 indicates diagrammatically the apparatus for making the original records;

Fig. 2 indicates diagrammatically the apin the patent to Wittel, 1576,59 2, July 10,

1928. The camera is operated by 2, motor in- .dicated in dotted linesaet 8, and film 9 passes through it in the usual Driven by belt 10 from s pulley on motor shaft is a pulley ll. of the sound reproduction mechanism of the Poulsen type. This is on a shaft with a larger pulley l2 and a driving pulley 13 for the magnetic wire M. A driving belt 15 passes over pulley 11 and also on a pulley 16 by which the take-up reel 17 is frictionally driven. The pulley i3 is the speed controlling and main driving elemcnt.

Wire 14 passes between two electromsgnets 19 in circuit, with s battery 20, switch 2?. and microphone 22.

The operation of this apparatus is obvious. The film is driven through. the camera and the -vvire' hetween'the magnets synchronouslysnd tit uniform speeds such es may he required for practical reasons. The wire may have ssmespeed as the film or any relative speed to it; but preferably moves much more rapidly'thari the film, its relative speed being determined by the driving ratio. The camera; records the visible action and the Poulsen systerm the sound in the usual way,

ln'Fig. 2 there is shown schematically system for making a photographic record from the magnetic record. Some of the elements are the same as in Fig 1. Wire itis passed from supply reel 18, between electro magnets 19 around the speed control and,

dr ving pulley 13 to the take-up reel 17, The pulleys 11, 12 and 16 and belt 15 functions as above described. Pulley it is driven by belt from a pulley 4' on the shaft of motor 8'. Similar pulleys drive by means of belts and 21 the pulley 22' and sprocket 23. Pulley 22' drives the take-up reel 33 frictionally.

Electromagnets 19 are in circuit with battery 25 and transformer 24, connected in a suitable system, designated 26 as a whole, by which a photographic record is made on the film 9, this being the undevelopedfilm hearing the latent images made in the camera 1. The particular system employed is immaterial to my invention, the one chosen for illustration being that shown in Fig. 1 of the United States patent to Case, No. 1,605,527, granted Nov. 2, 1926, in which the modulated light from lamp 27 falls through a slot 28 in plate 29 upon the film 9 as it is drawn from supply reel 30, over roller 31, and sprocket 23 to the take-up reel 33. The drive ratio for the two records will, of course, be such that this sound record is properly synchronized with the picture record. The particumethodof controlling the starting point and maintaining the records'in synchronization is not a part of the present invention.

The film 9 hearing the latent sound and picture records is then submitted to a known reversal process such as that described in the United States patent to Capstaff, No. 1.460,?03, granted July 3, 1923 and positive silver sound and picture images are formed therein. I

It will thus be possible for an amateur to take sound records with comparatively sim,- ple recording instrument, send the wire and film to a central processing station where the sound record is transformed into a photographic one. He receives hack the single film which he can use in reproduction Where portability is not so necessary as in recording.

The magnetic system offers particularly the advantages of simplicity in recording and is of particular advantage at that point. It is to be understood that any type of photographic record may be made, varying ther in density or in area. 1 do not restrict L 'ention to tne details here shown scribed but contemplate as included therel equivalents and modifications falling nm the scope of the appended claims. Having thus described my invention, What Ti claim as new and desire to secure by Letters Patent is 1. The method of making photographic sound and picture records that comprises exposing a sensitized film band in a motion picture camera, thus forming a latent picture image thereon, making a magnetic sound rec- 0rd in a metallic carrier, translating the mag netic sound record into a latent photographic record upon the said sensitized film band carrying the latent picture image and transforming the two latent images by a single reversal process into positive silver images. 2. The method of making synchronized day of January, 1930.

LOYD A. JONES. 

